I don't want to see Bucky become Cap. That always seemed weird to me in the comics because didn't he murder hundreds of people as the Winter Soldier? I know he was brainwashed or whatever, but still... that's not exactly someone I want to see as an inspirational symbol.

In addition to his countless assassinations, Bucky slaughtered hundreds (thousands?) in Philadelphia and committed other atrocities. Comic book writers can gloss over disturbing stuff like that but it would never fly in the film universe. There are people on this forum arguing that Captain America is too good to have sex; think of the reaction of the GA if Steve Rogers were replaced by a mass murdering psychopath.